1. A new portable chest drainage device
Renzo Lodi, MD, Alessandro Stefani, MD 
The Annals of Thoracic Surgery 
Volume 69, Issue 4, Pages (April 2000)
DOI: /S (99)

2. Fig 1
The drawing represents the plan of the device and shows its peculiar technical aspects: (1) protection cap, (2) conic connection, (3) drawing point, (4) air filter, (5 & 8) one-way valve, (6) air and fluid stop balls, (7) drip chamber, (9) collection bag.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

3. Fig 2 Photograph of the device.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

4. Fig 3
Photograph of the conic connector with the button and the one-way valve.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )

5. Fig 4 Photograph of the one-way exhaust valve.
The Annals of Thoracic Surgery  , DOI: ( /S (99) )